diff --git a/volia/masseffect.py b/volia/masseffect.py
index b5f5ef7..3cbb813 100644
--- a/volia/masseffect.py
+++ b/volia/masseffect.py
@@ -23,7 +23,7 @@ def utt2char(features: str, outfile: str):
             splited = key.replace("\n", "").split(",")
             character = splited[1]
             f.write(",".join(splited) + " " + character + "\n")
-    
+
 
 def char2utt(features: str, outfile: str):
     raise Exception("Not implemented yet")
@@ -74,8 +74,8 @@ def changelabels(source: str, labels: str, outfile: str):
     with open(outfile, "w") as f:
         for key in keys:
             splited = key.split(",")
-            splited[1] = labels_dict[key]
-            core.data.write_line(",".join(splited), data_dict[key])
+            splited[1] = labels_dict[key][0]
+            core.data.write_line(",".join(splited), data_dict[key], out=f)
 
 
 if __name__ == '__main__':
@@ -119,4 +119,4 @@ if __name__ == '__main__':
         "changelabels": changelabels
     })
 
-    runner.run(args.which, args.__dict__, remove="which")
\ No newline at end of file
+    runner.run(args.which, args.__dict__, remove="which")